Coffee roaster



FIG. 1 is an upper, front, and left side isometric view of a coffee roaster showing the new design;

FIG. 2 is a left side elevation view thereof;

FIG. 3 is a right side elevation view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is a front elevation view thereof; and,

FIG. 7 is a rear elevation view thereof.

The dashed lines and structure they depict form no part of the claimed design. 

CLAIM The ornamental design for a coffee roaster, as shown and described. 